William e



W. E. FOLTZ.

HYDBOCAHBDN MOTOR.

APPLICATION FILED FEB. 15, 1915.

I TL 3U$,A@9@ Patented July 1, 1919.

LLIAM E. EQ'LT'Z, 015 DETROIT, MICHIGAN, ASSIGrNOR TO CADILLAC MOTQR C COMPANY 013 DETROIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

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To all whom it may concern:

Be it known that 1, WILLIAM E. FoLTz, a citizen of the United States, and resident of Detroit, Wayne county, State of Michigan, have invented certain new and useful Improvements in Hydrocarbon Motors, of which the following is a specification.

This invention relatesto hydrocarbon motors, and particularly to cooling system therefor.

In previous cooling systems of internal combustion engines, especially, as adapted for use in motor vehicles, where the system generally comprises the cylinder jacket, a radiator and conduitsconnecting them, no provision has been made for condensing, or preventing the discharge of, v the vapors formed in the system when the temperature of the cooling medium rises above the vaporizing or boiling point. On the other hand, these vapors havebeen discharged into the atmosphere, with resultant expenses and inconveniences necessarily attending a frequent replenishing of the cooling medlum.

These systems have become especially burdensome and expensive where operating in lower temperature conditions, when costly non-'freeze solutions must be necessarily used. Therefore, one of the objects of this invention is to obviate some of the difficulties heretofore associated with previous cooling systems, and to provide means for condensing and retaining any vaporized liquids formed in the cooling systems.

Another object is-to provide means for condensing any vapors formed in the cooling system and to automatically -return the liquid to the active part of the system from the condensin means. 1

Other 0 jects are to provide novel and improved means for transferring the liquid from the condenser to the cooling system, and for draining the liquid from the con denser. 1

These and other objects will appear from the following description, taken in connection with the drawing which forms a part of this specification, and in which is illustrated a side elevation, with parts in section, of a Specification of Letters Patent.

motor vehicle power plant, embodying a preferred form of my invention.

lteferring to the drawings, 10 represents the .usual crank case, on which may be mounted, in suitable V or other relation, a plurality of cylinder blocks, one of which is illustrated at 11, maintained onv the crank case 10, as by bolts 12. A radiator 13 and fan 14 are arranged adjacent the front end .of the motor and cooperate, as will appear more fully hereinafter, to'temper theli uid in the cooling system.' The cylinder b ock 11 is provided with-the usual liquid jacket 15 having an intake port 16, adjacent one end thereof, and an outlet port 17 formed in its opposite end. Suitable connections, which may be in the form of an intake conduit 18, pum mechanism '19 ofthe well known centri 'ugal type, conduit 20 between the pump and the outlet port formed in'the lower part of the radiator, another flexible Patented July 1, 1919.. Application filed February 15, 191$, Serial Ito. 78,4439.

conduit 21, between the outlet port 17 and the radiator inlet port 18, and a bypass conduit 19 connecting the conduits20 and 21, and any well known valve, which may be located in a chamber 22, for controlling the medium circulation, complete a double path circulation system between the radiator 13 and the liquid jacket 15 of cylinder block 11.

The radiatorfilling thimble 23 is provided with a valve controlled vent 24 and an imperforate cap 25. A. conduit 26, which may serve as a radiator overflow pipe,.connects a point within the radiator above the normal level of the liquid to a condenser, in a manner which will be presently described.

The condenser, as illustrated, consists of a tank 27 having a pair of liquid inlet ports 28 and 29 formed in its bottom and adapted to beconnected," as byunions 30 and 31, with the lower end of the conduit 26. A pipe 32, having its upper end 33 in communication with the interior of the tank 27 and its lower ated in the radiator by the hot liquid contained' therein will be discharged intoqthe pipe 26 and after partially or wholly condensingtherein, will fiow into the tank at 28 and 29. The tank may have a sufficient supply of liquid therein, to cover the inlet ports so that all vapors passing into the tank 27 must circulate through the liquid and be thereby condensed.

Of course it is not necessary that a tank and liquid be utilized for condensing thesevapors, as various other means may be used. For example, a conduit might be coiled in back of the radiator 13 and condense the vapors by passing them through this conduit, which would be cooled by the air drawn through the radiator.

It will beunderstood that the vapors having been discharged from the radiator 13to the tank, a vacuum will be formed in the radiator 'upon the cooling of the liquid, and the atmospheric pressure-on the surface of the liquid in the tank will automatically return substantially all of the condensed liquid to the radiator. And, of course; if the tank is below the top of the radiator, the return of the liquid will be performed by lifting it from the lower level to the higher.

However, if, as a result of leads in the connections between the radiator and the.

tank, or for any other reasons, there is insufiicient difference in pressure between the tank and radiator, respectively, the pressure on the liquid in the tank may be increased by means of a pump 35, of the well known hand type, which may have its barrel 36 secured, as by threads at 37, to the tank 27.

. It will'be understood that instead of using an air pump for returning the liquid to the.

radiator, a liquid pump may beused for the vsame purpose. Of course, if the pump were used to return the liquid to the radiator the vent 32 would be closed to the atmosphere by means of the valve 3 and the vent 24 in the radiator would be opened. After sufiicient liquid had been returned, these valves Would be placed in their original posi-' tlonsand the valve 38 in the pump barrel would be .closed. A drain port 38, adapted to be controlled by a valve 39 at the lower part of the tank 27, may be provided. A

to operate liquid cooling systems of hydrocarbon motors at the maximum capacity for which they were designed, without requiring a frequent replenishing of the cooling medium, necessitated by the loss of liquid from the system by overflow. Assuming the radiator to be filled up while the during a given time, as it will after the circulation has been stopped, for the reason that the radiatin capacity of the cooling system may be sucient to prevent the cooling medium from going above the vaporizing point during the operation of the motor. but it is found that the liquid in the radiator will, in many cases, boil over immediately upon the stopping of the motor, so that while the liquid may not vaporize or overflow while circulating, it may do this upon the stopping of the motor. I have also found that when the liquid supply in the radiator is below normal, the liquid vaporizes more rapidly than when there is a full supply in the upper part of the radiator; this for the reason that with the liquid supply low, the unimmersed parts of the radiator become heated and the overheated cooling medium, which comes into the radiator in a vaporized state, is discharged therefrom unchanged; on the other hand, if there is a comparatively large body of liquid in the upper part of the radiator, it tends to condense the vapors, thus increasing the elliciency of the cooling system, as a whole. By maintaining a substantially undiminis'hedquantity of liquid in the cooling system, I am enabled to operate under greatly improved conditions.

While I have shown a preferred embodiment of my invention, it will be obvious that Various modifications and changes may be made Without departing from the spirit and scope hereof, as defined by the appended claims.

Having thus described my invention. what I claim and desire to secure by Letters Patcut is.:

1. In a liquid circulating system. a plurality of tanks, a pipe connecting them, one of said tanks being a closed receptacle and adapted to normally carry a supply of liquid therein, another of said tanks having a vent leading to the atmosphere, the arrangcnu-nt of said pipe and connections being such that vapors generated in said first tank shall be condensed and carried to said second tank. and means for draining the liquid in said tank at a selected predetermined level.

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lllll incense bination, a plurality of tanks, a pipe lead ing from the" upper part of one of said tanks to a plurality of openings inthe lower part of another tank, one of said tanks being a sealed receptacle and the other being open to the atmosphere as and for the purpose set forth.

'3. In a liquid circulatin system, in combination, a plurality of tan rs, a pipe leading from the upper part of one of said tanks to the lower part of anothertank, one of said tanks being a sealed receptacle and the other being open to the atmosphere, and a stand pipe arranged in one of said tanks and hav-- ing a' drain cock at the lower end thereof as and for the purpose set forth.

, 4-. The combination with a vapor generator, and a tank, a pipe connecting the up per part of said generator with openings at opposite sides of the lower part oil said tank, said tank being adapted to normally carry a supply of liquid therein, and being provided with a vent above the normal level of said liquid, as and for the purpose set forth.

5. The combination with a vapor generator, and a tank, a pipe connectin the upper part of said generator with t e lower part of said tank, said tank being adapted to normally carry a supply of liquid therein, and being provided with a plurality of stand pipes of different heights and vented to the atmosphere, whereby vapors formin in said generator will be conducted to said tank and condensed therein by passing through said liquid and will be automatically drawn back into said generator in the form of liquid.

6. The combination with a vapor generator, and a tank arranged below the top of said generator, a pipe connecting the upper part of said generator with a lower part of said tank, said tank being provided with means whereby vapors forming in said generator shall be conducted to said tank from a selective level and retained therein as condensation, and adapted to be automatically returned to the generator by the did'erence in the pressures of said generator and tank, respectively, and means for supplementing the pressure in said tank. I

7. The combination with a vapor generator, and. a tank arranged below the top of said generator, a pipe connecting the upper part of said generator with a lower part of said tank, whereby vapors forming in said generator shall be conducted to said tank from a selective level and retained therein as condensation, and adapted to be auto matically returned to the generator by the difference in the pressures of said generator and tank, respectively, said tank also being provided. with a manually operated pump mechanism for lifting said condensation to said generator.

8. In a device of the class described, a tank provided with an inlet port, an outlet port connected to said tank at a selective level, a stand pipe having a drain cock at the lower-end thereof, and a pump, as and for the purpose set forth.

4 9. In a device of the class described, a tank provided with an inlet port, an outlet port connected to said tank at a selective level a closable vent, and a pump, as and for the purpose set forth.

10.. The combination with a vapor generator, provided with an air vent, a valve for said vent, a tank, said tank having a vent, a valve for said latter vent, a pipe connecting the upper part of said enerator with the lower part of said tan r, a manually operated. pump for said tank, a valve for controlling the communication of said pump with the interior of said tank.

11. In a hydrocarbon motor, the combination with acketed cylinder blocks, means for cooling said jackets, comprising a radiator and pipes connectin the same with the jacket, a condenser chain er, a pipe connecting a point in said radiator above the normal level of the liquid with the interior of said tank, said tank being provided with a means for draining the same at varying levels, all as and for the purpose set forth.

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illi- 12. In a hydrocarbon motor, the combination with jacketed cylinder blocks, means for cooling said jackets, comprising a radiator and pipes connectingthe same with the jacket, a condenser chamber, a ipe connecting a point in said radiator a ove the normal level of the liquid with the interior of said tank, at a selective height therein, said tank being provided with a vent, a pump for said tank and operative inde pendent of said motor, all as and for the purpose set forth.

13. In a liquid cooling system, the combi nation with a body who cooled, a radiator, pipes connecting said body and radiator, a tank provided with a plurality of stand pipes operative upon diil erent heights of liquid in said tank, a conduit connecting a point in radiator above the normal level of the liquid therein with said tank, whereby denser for condensing any vapors formed by said liquid and means for draining said condenser to predetermined levels.

15. In a liquid circulating system, in eomllllll Illh 'llIlll Ilh Idll

ator, conduits connecting said jackets and radiator, an overflow tank, and a conduit 10 connecting the same at a plurality of points to a point within the radiator, above the normal level of the liquid, as and for the purpose set forth.

In testimony whereof I aflix my signature. l5

lVILLIAM E. FOLTZ. 

